Investigation And Risk Assessment Of Forestry Pests From Luoding City,guangdong Province

In order to understand the occurrence of forest pests in Luoding City,to more accurately predict the time and degree of occurrence of pests and diseases,we conducted a survey of forestry pests in Luoding City,conducted a survey of newly discovered quarantine forestry pests Risk assessment analysis.The main types of pests in Luoding City were analyzed and summarized,which provided the theoretical basis for predicting the occurrence and development trend of forestry pests and scientific prevention and control.The survey found and identified there are 169 kinds of forestry pestand natural enemies,including forest harmful insects(57 family,139 species),diseases(6 family,6 species),weeds(4 family,4 species),natural enemies(4 famliy,4 species).4 kinds of forest quarantine pests(Phenacoccus solenopsis Tinsley,Heterobostrychus aequalis Waterhouse,Solenopsis invicta Buren,and Mikania micrantha Kunth).5 kinds of forestry risk pests,including 3 species of pest insects(Hemiberlesia pitysophila Takag,Apriona germari Hope,Leptocybe invasaFisher La Salle).2 Species of harmful plant(Cassytha filiformis Linnaeus,Ipomoea cairica Linnaeus).There were140 species of other forestry pests,including 133 species of pest insects,6 species of diseases,1 species of harmful plants;and 20 species of natural enemies.The results showed that the risk index R value of Phenacoccus solenopsis Tinsley was 2.14,the R index of Heterobostrychusaequalis Waterhouse was 2.11,the R index of Solenopsis invicta Buren was 2.15,the risk index of Mikania micrantha Kunth was 2.04,and these four kinds of harmful organisms were highly hazardous types.The results of the investigation of harmful pets in Luoding City were analyzed,and the database of forestry pests in Luoding was established and perfected,which set up a solid foundation for the future prevention and control of forestry pests.For the protection of forest resources,improve the ecological balance and promote the sustainable development of society has made tremendous contributions.